Improvement in sandpapering-machines



V. HEPP.

Sand-Papering Machine. No. 159,574, Pawnee Feb. 9,1875.

WITNESSES:

UNITED STATES PATENT GEEreE.,

VALENTINE HEPP, OF CHICAGO, ILLINOIS.

IMPROVEMENT IN SANDPAPERING-MACHINES.

Specification forming part of4 Letters Patent No.'159,574, datedFebruary 9, 1875; application led December 12, 1874.

To all whom it may concern:

Be it known that I, VALENTINE HEPP, of Chicago, in the county of Cookand State of Illinois, have invented a new and ImprovedSandpapering-Machine, of which the following is a specification:

My improvement in sandpapering-machines consists of a hollow shaft tothe frame which carries the heads around, with a shaft running downthrough it, and carrying a large spurwheel,which gears with thepad-carrier, so as to divide the motion between the carrying-frame andthe driving-shaft, in such a manner as to obtain the requisite rapidmotion of the padcarriers without having to run either the frame or thedrivin g-shaft at a high speed.

Figure lis a longitudinal sectional elevation of my improved machine.Fig. 2 is a plan View with a part of the dust-case broken out. Fig. 3 isa detail of the feed-gear in section. Fig. 4 is a section of' one of thepad-carrying heads.

Similar letters of reference indicate correspondin g parts.

A is the shaft that carries the frame B, on which the padbarrying headsC are carried over thework. This shaft is made hollow, and a shaft, D,is arranged in it, with a large spur-wheel, E, on its lower end, gearingwith the heads C by their pinions F, t-o revolve them on their own axis.Ihe frame is revolved in one direction. by a belt applied to the pulleyG, while the wheel E is revolved in the opposite direction by a belt onthe pulley II, so

that the motion is equally divided between the carrying-frame and thedriver, in such manner that a high speed is obtained for the padswithout running the driver or the carrier as high as would be requiredif all the motion were obtained from one alone. Thisl makes the machinerun with less power than as commonly arranged, and consequently withless wear.

The carriage J whereon the work is carried, is operated by thespur-wheel K, gearing with the toothed rack L, and connected to thebevelwheel M, with which the two bevel-drivers -N and O gear on oppositesides, so as to move the carriage forward and backward, the driversbeing turned by the same driving-belt, which shifts from one to theother of the pulleys P Q to reverse the motion.

I am aware that smoothing and rendering uniform the surface of plates bya series of disks rotating about a common center is a1 ready known tothe public 3 but What I claim is 1. The combination of the hollow shaftA,

' carrying-frame B, pad-frames C, driving-shaft D, wheel E, and pinionsF, substantially as specified.

2. The combination of spur-wheel K, bevelwheel M, and drivers N O withthe toothed bar L of the carriage, substantially as specilied.

VALENTINE HEPP. Witnesses:

C. B. LA MOINE, JOHN BUEHLER.

